200 KVA Distribution Transformer Life Time Cost Evaluation Including Environmental Cost

A large number of distribution transformers are being currently used in the electricity distribution network in India. During purchasing them, it is not sufficient to evaluate and analyze only the bid price of the transformer. There are no-load losses as well as load-losses in the transformer during its lifetime. The cost evaluation of transformers is depends on total owning cost (TOC) method that consist of transformer bid price and cost of transformer losses. Similar to energy cost, greenhouse gas (GHG) emissions are also assigned a price by energy markets. Therefore this study recommended an innovative transformer cost evaluation methodology by introducing the environmental cost (EC) into the conventional TOC method. This environmental cost is coming from the cost to buy GHG emission credits because of the GHG emissions associated with supplying transformer losses throughout the transformer lifetime. It is important to include the environmental cost of transformer losses into the cost minimizing evaluation of distribution transformers. So the transformer with minimum TOC would be the most energy efficient transformer, such transformer are commercially and technically viable. Reduction in power losses in transformer further improves the economy of power industry and impact the global environment. The paper also discusses the case of MPPKVVCL Jabalpur where adoption of such energy efficiency transformer can reduce the electrical power generation requirement due to lower losses and reduction in co2 emissions.